Abstract
In experiments with superconducting quantum circuits, characterizing the photon statistics of propagating microwave fields is a fundamental task. We quantify the n2+n photon number variance of thermal microwave photons emitted from a blackbody radiator for mean photon numbers, 0.05n1.5. We probe the fields using either correlation measurements or a transmon qubit coupled to a microwave resonator. Our experiments provide a precise quantitative characterization of weak microwave states and information on the noise emitted by a Josephson parametric amplifier.
| Original language | English |
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| Article number | 103602 |
| Journal | Physical Review Letters |
| Volume | 118 |
| Issue number | 10 |
| DOIs | |
| State | Published - 8 Mar 2017 |